Singer Fergie, best known for her work with the Black Eyed Peas, has signed on to star in Rob Marshall's latest musical, Nine, according to Variety. The film already boasts a very impressive ensemble cast that includes Daniel Day Lewis, Nicole Kidman, Kate Hudson, Penelope Cruz, Judie Dench and Sophia Loren. Fergie previously had a small role in the Quentin Tarantino/Robert Rodriguez flick, Grindhouse.